Patents by Inventor Stefan Graeber

Stefan Graeber has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Ophthalmologic visualization system
    Patent number: 9089283
    Abstract: A method determines the position and/or radius of the limbus and/or the position and/or radius of the pupil of a patient eye. In the method, an image of the patient eye is obtained and a plurality of different ring-shaped comparison objects having respective radii and respective centers are provided. The image is correlated with the plurality of comparison objects to yield a local best match between the image and the comparison objects when there is a coincidence of one of the ring-shaped comparison objects and a ring-shaped jump in brightness in the image having the same radius and the same center. The comparison objects having a local best match with the image are determined. Thereafter, the position of the center of the comparison object having a local best match with the image is selected as the position of the center of the limbus and/or the position of the center of the pupil.
    Type: Grant
    Filed: January 3, 2014
    Date of Patent: July 28, 2015
    Assignee: Carl Zeiss Meditec AG
    Inventors: Thomas Schuhrke, Guenter Meckes, Stefan Graeber, Keith Thornton
  • OPHTHALMOLOGIC VISUALIZATION SYSTEM
    Publication number: 20140118696
    Abstract: A method determines the position and/or radius of the limbus and/or the position and/or radius of the pupil of a patient eye. In the method, an image of the patient eye is obtained and a plurality of different ring-shaped comparison objects having respective radii and respective centers are provided. The image is correlated with the plurality of comparison objects to yield a local best match between the image and the comparison objects when there is a coincidence of one of the ring-shaped comparison objects and a ring-shaped jump in brightness in the image having the same radius and the same center. The comparison objects having a local best match with the image are determined. Thereafter, the position of the center of the comparison object having a local best match with the image is selected as the position of the center of the limbus and/or the position of the center of the pupil.
    Type: Application
    Filed: January 3, 2014
    Publication date: May 1, 2014
    Applicant: Carl Zeiss Meditec AG
    Inventors: Thomas Schuhrke, Guenter Meckes, Stefan Graeber, Keith Thornton
  • Computer generated interface for a touch-sensitive computer screen
    Patent number: D631059
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: January 18, 2011
    Assignee: Carl Zeiss Surgical GmbH
    Inventors: Robert Hien, Christian Heilmann, Stefan Graeber